Add more sortable columns to ticket admin.
Add more sortable columns to ticket admin.

Show unset ticket names.

EuroPython/epcon,artcz/epcon,artcz/epcon,barrachri/epcon,matrixise/epcon,matrixise/epcon,artcz/epcon,PythonSanSebastian/epcon,PythonSanSebastian/epcon,matrixise/epcon,matrixise/epcon,PythonSanSebastian/epcon,barrachri/epcon,PythonSanSebastian/epcon,artcz/epcon,barrachri/epcon,malemburg/epcon,EuroPython/epcon,malemburg/epcon,barrachri/epcon,artcz/epcon,malemburg/epcon,EuroPython/epcon,PythonSanSebastian/epcon,artcz/epcon,malemburg/epcon,matrixise/epcon,barrachri/epcon,matrixise/epcon,PythonSanSebastian/epcon,malemburg/epcon,barrachri/epcon,malemburg/epcon,EuroPython/epcon